Understanding the main Sumitomo excavators parts and their functions offers numerous benefits. This knowledge enables you to identify issues more quickly and address them with assurance. Operators familiar with the Sumitomo excavators parts tend to save money and experience fewer breakdowns.
Being aware of the quality and function of Sumitomo excavators parts can significantly reduce repair expenses.
Upgrading to better parts for the excavator, such as the travel reducer, can extend their lifespan and decrease the frequency of failures.
Making informed decisions regarding excavator parts and their roles can lead to substantial savings each year.
By educating yourself about Sumitomo excavators parts, you can enhance the machine’s performance and manage its costs effectively over time.
Key Takeaways
Knowing Sumitomo excavator parts helps you find problems fast. This can help you save money on fixing your machine.
Taking care of the undercarriage, like track chains and rollers, stops breakdowns. It also makes your excavator last longer.
Keeping the hydraulic system in good shape is important. You should check for leaks and change fluids often. This helps your excavator work well.
Picking the right attachments and wear parts is helpful. Using things like bucket teeth and quick couplers makes your excavator do more jobs. It also helps it work better.
Sticking to a regular maintenance plan for filters, seals, and gaskets is smart. This helps you avoid expensive repairs. It also keeps your excavator working smoothly.
Undercarriage Excavator Parts
The undercarriage holds up your excavator and lets it move. It helps the machine stay steady and gives it grip, even on bumpy ground. If you take care of the undercarriage, it spreads out the weight and stops breakdowns. If you do not check these parts, your excavator might lose balance and not move well.
The undercarriage helps your excavator grip the ground. This is important for staying steady and moving. The undercarriage spreads out the weight, so the machine can work on different ground. If you keep it clean, you stop dirt from building up. Too much dirt can make the machine heavy and hard to control. Track shoes and grousers are made to help the excavator grip better and clean itself. This helps the machine move in many places.
Track Chains and Shoes
Track chains and shoes work together to help your excavator move. The chains link together and hold the shoes. The shoes touch the ground and help the machine grip. Track chains keep the tracks straight, and the shoes help the excavator go forward or backward.
Tracks usually last between 1,200 and 2,000 hours. Track chains last about 1,500 to 2,000 hours.
If you see cracks or broken shoes, the tracks are wearing out. In rough places, you might see scratches or missing pieces. If the chain feels loose, it means it is getting old.
If you notice these problems, you should get new parts before something breaks.
Rollers (Top and Bottom)
Rollers hold up the excavator and keep the tracks in place. Top rollers, or carrier rollers, guide the top of the track and stop it from sagging. Bottom rollers, or track rollers, help the machine move over rough ground and take in bumps.
Track rollers keep the tracks tight and straight. They help the excavator move and take in shocks.
Carrier rollers hold up a lot of the machine’s weight. They guide the tracks and help the machine move smoothly.
Rollers spread out the weight, so other parts do not wear out fast.
To make rollers last longer, clean off dirt after each use. Check for worn parts and make sure the tracks are tight. Try not to turn sharply or drive on rough ground too much.
Sprockets
Sprockets help move the tracks and work with the track link assembly. You need sprockets for moving, gripping, and spreading out weight. Sprockets are very important for your excavator to work well.
Failure Mode | Description |
|---|---|
Uneven Wear | One side of the sprocket teeth wears down faster. This can happen if the tracks are too loose or guides are broken. |
Tooth Sharpening | The tips of the teeth get sharp, which makes the chain slip more. |
Poor Meshing | This happens if the chain and sprocket do not fit together right. |
If the sprockets are not lined up, they wear out faster. Sprockets can wear out from heavy work, not enough oil, or lots of dirt. Teeth can break if something hits them hard. Water can make them rusty and weak. Dirt can make them wear out and not line up. Not enough oil makes them get hot and wear out faster. If the tracks are too loose, sprockets and chains can get damaged.
Idlers
Idlers help guide the track chain and keep it tight and straight. You need idlers to take in bumps and spread out weight. This stops the tracks from coming off and wearing out unevenly. Idlers help your excavator work smoothly and last longer.
If the idler is not straight, the whole track system has problems. It is like driving a car with a bent axle.
Idlers help hold up the machine and the track chain. They guide the track chain around the front of the frame. Idlers are also where you adjust the track tension, usually with a grease cylinder.
Inspection Frequency | Details |
|---|---|
Daily | Check for oil leaks, cracks, missing bolts, worn spots, and track sag. |
Weekly | Clean off mud, check seals, listen for strange sounds, and look for metal bits in oil or grease. |
Every 250 hours | Look for uneven wear, cracks, dents, or broken parts. Listen for odd noises when using the machine. |
Track Frame
The track frame holds all the undercarriage parts together. You need the track frame for strength and to keep the tracks straight. It holds up the excavator and keeps everything lined up.
Feature | Benefit |
|---|---|
EMS (Lubrication System) | Keeps pins and bushes oiled for up to 1000 hours. This stops rattling. |
Improved Boom and Arm Design | Makes the machine stronger and tougher. |
High Strength Castings | Used for important parts to make them last longer. |
Clean and oil the undercarriage often to help it grip and stay steady. Check for worn parts to keep your excavator working well.
Rubber Tracks
Rubber tracks make the ride quieter and help the operator feel less tired. You might pick rubber tracks for city work or landscaping because they do not hurt the ground as much. Steel tracks last longer and grip better on rough ground, but they can break pavement and make more noise.
Track Type | Pros | Cons |
|---|---|---|
Steel Tracks | 1. Lasts long and handles rough ground and sharp things. | 1. Makes more noise and shakes more. |
2. Grips better on tough ground. | 2. Can break pavement because it is stiff. | |
3. Lasts longer than rubber tracks. | 3. Needs more care over time. | |
4. Good for hard jobs. | ||
Rubber Tracks | 1. Quieter ride and less tiring for the operator. | 1. Does not grip as well on tough ground. |
2. Softer on pavement and grass. | 2. Gets damaged easier by sharp things. | |
3. Costs less at first. | 3. Cannot carry as much weight. | |
4. Good for city work and landscaping. |
Pick the right tracks for your job and where you use your excavator.
Hydraulic System and Main Excavator Parts
The hydraulic system is very important for your excavator. It makes almost every part move. This system gives the machine its strength and lets it do many jobs. If you know about these main parts, you can keep your machine working well. You can also stop big repairs from happening.
If you take care of the hydraulic system, your excavator lasts longer. You can stop problems by looking for leaks and making sure everything is tight. Change the fluids and filters when you should. Watch the temperature and fluid levels to find problems early.
Hydraulic Pump
The hydraulic pump is a very important part. It pushes hydraulic fluid through the system. This makes the excavator strong enough to lift and dig.
Testing Method | Description |
|---|---|
Pressure Measurement | Checks the real pressure and compares it to the normal pressure. |
Testing Conditions | You need to check engine speed and oil temperature first. |
Key Points of Adjustment | You look at the pressure and change it if needed. |
You should check the hydraulic pump often. This helps you find leaks or low pressure before they get worse. If your excavator is weak or slow, check the pump right away.
Some things can make the pump break. These include dirt, not enough fluid, bubbles, and too much work. Bad seals or the wrong oil can also cause leaks and damage.
Cause | Explanation |
|---|---|
Contamination | Dirt can wear out the pump and break down the fluid. |
Inadequate Lubrication | Not enough fluid or the wrong kind makes the pump hot. |
Cavitation | Bubbles pop and hurt the pump. |
Overloading | Too much work or the wrong pump size can break it. |
Hydraulic Cylinders
Hydraulic cylinders help move the boom, arm, and bucket. They give the power to lift, lower, and tilt heavy things.
The boom and bucket cylinders move the arm and bucket up and down.
The bucket cylinder helps with digging and loading.
These cylinders let you work with heavy things and in hard places.
If you see oil leaking or hear odd sounds, check the cylinders. Change old seals and keep the rods clean to stop damage.
Main Control Valve
The main control valve is a key part. It sends hydraulic fluid to different parts of the excavator. This valve lets you move the boom, arm, bucket, and tracks.
Function/Characteristic | Description |
|---|---|
Control of Hydraulic Fluid Flow | Controls how fluid moves, which is needed for the machine to work. |
Performance of Intended Functions | Lets the excavator do many jobs by sending fluid where it is needed. |
Movement Control | Helps the excavator move forward or backward. |
Efficiency Enhancement | Makes the machine work better and faster. |
If the valve sticks or leaks, the excavator may move slowly or not at all. Clean the valve and check the seals to keep it working.
Hydraulic Oil Cooler
The hydraulic oil cooler keeps the fluid at the right temperature. This stops the system from getting too hot and breaking.
The oil cooler takes heat away from the hydraulic oil.
It helps the excavator last longer by stopping overheating.
A good oil cooler protects the engine and hydraulic system from heat.
Check the oil cooler for clogs or leaks. Clean it and make sure air can move through it.
Hoses and Fittings
Hoses and fittings connect all the main parts in the hydraulic system. They carry fluid under high pressure to the cylinders and motors.
Some problems with hoses and fittings are:
Dirt can get in and wear out the hoses.
Leaks can happen if hoses are cut or loose.
Cracks can come from too much pressure or bending.
Outside damage can happen if something hits the hose.
Bad installation can make hoses wear out fast.
Worn seals or fittings can cause leaks.
Debris can clog hoses and stop fluid from moving.
Check hoses and fittings often. Change broken hoses right away and keep everything tight to stop leaks.
Travel Motor Seal Kits
Travel motor seal kits keep fluid inside the travel motor and block dirt. These kits help your excavator move well.
The seal kits stop leaks and keep pressure steady.
They keep dirt and water out of the travel motor.
Changing seal kits on time stops breakdowns and keeps your machine working.
The kits have O-rings, backup rings, shaft seals, lip seals, wear rings, and dust seals. Each part helps keep the motor sealed and working.
If you see oil near the travel motor or weak movement, check the seals. Change them if needed to stop bigger problems.
Tip: Take care of the hydraulic system by checking for leaks, changing fluids, and looking at hoses. This helps your excavator last longer and work better.
Engine and Powertrain Components
The engine and powertrain give your excavator its strength. These parts help it dig, lift, and move things. They work together so the machine runs well every day. If you know how these parts work, you can find problems early. This helps you keep your excavator working its best.
Engine Assembly
The engine assembly is like the heart of the excavator. It burns fuel to make energy. This energy moves the hydraulic system and the tracks. The engine assembly has many important parts. Some of these are the flywheel, exhaust manifold, and crankcase. Each part does something special. The flywheel helps the engine run smoothly. The exhaust manifold takes away hot gases.
If you hear odd sounds or see smoke, check the engine. Fixing problems fast can stop bigger issues.
Engine Overhaul Kits
If your engine gets old or weak, you might need an overhaul kit. This kit has new gaskets, crankcase studs, check valves, and turbocharger bolts. You use these kits to rebuild the engine and make it strong again. Overhaul kits help you save money because you do not need a new engine.
Overhaul kits usually have:
Crankcase gaskets
Oil jet and oil sprayer jet
Turbocharger gaskets
Changing these parts can stop leaks and help the engine work better.
Fuel System
The fuel system brings diesel to the engine. It has pumps, filters, and injectors. If the fuel system works well, your excavator starts easily and keeps running. Dirty fuel or clogged filters can make the engine weak. Check the fuel system often to keep your excavator strong.
Cooling System (Radiator, Fan)
The cooling system stops the engine from getting too hot. The radiator and fan take heat away from the engine. If the cooling system breaks, the engine can get too hot and stop. Clean the radiator and check the fan for damage. A good cooling system helps your excavator last longer.
Cooling System Part | Function |
|---|---|
Radiator | Takes heat from engine |
Fan | Blows air through radiator |
Air Filters
Air filters keep dirt and dust out of the engine. Clean air helps the engine burn fuel better. If the air filter is dirty, the engine can lose power and use more fuel. Check and change air filters often, especially if you work in dusty places.
Tip: Change old engine mounts and support bolts to lower vibration and protect your excavator’s engine.
Cab and Operator Controls
The cab is where you spend most of your time when you operate an excavator. This area gives you comfort, safety, and access to all the main controls. You need to know each part of the cab to work safely and get the best performance from your machine.
Operator Seat
You sit in the operator seat every time you use the excavator. A good seat supports your back and helps you stay comfortable during long hours. Many seats have adjustments for height, angle, and distance from the main controls. If your seat feels loose or worn, you should fix it right away. A strong seat helps you avoid fatigue and keeps you focused on your work.
Control Levers and Joysticks
You use control levers and joysticks to move the excavator. These controls let you lift the boom, move the arm, and swing the cab. The main controls respond quickly, so you can dig, lift, or turn with ease. If you notice sticky movement or slow response, check for dirt or worn parts. Clean controls help you work faster and safer.
Display Panel and Gauges
The display panel sits in front of you inside the cab. It shows important information about the excavator, such as fuel level, engine temperature, and warning lights. Gauges help you spot problems before they get worse. If you see a warning light, stop and check the function of the part right away. Keeping an eye on the display panel helps you avoid costly repairs.
Tip: Always check the gauges before you start your shift. This habit can save you time and money.
Safety Features
The cab has many safety features to protect you. You will find seat belts, emergency exits, and reinforced glass. Some cabs have cameras or alarms to help you see around the excavator. Safety features lower the risk of injury and help you follow job site rules. Always use the seat belt and check that all safety parts work before you start the machine.
A well-designed cab with working controls and safety features lets you do your job with confidence.
Attachments and Wear Parts of an Excavator
Attachments and wear parts help you get the most out of your excavator. You can change these parts to match the job. When you know how each part works, you can keep your machine running longer and avoid costly repairs.
Boom, Arm, and Bucket
The boom, arm, and bucket form the main working group of your excavator. The boom lifts and moves the arm. The arm reaches out and pulls back. The bucket digs, scoops, and carries soil or rocks. You use the excavator boom to raise the excavator arm and reach far. The bucket attaches at the end of the arm. Each part must move smoothly for the excavator to work well. If you see dents or cracks on the boom or arm, fix them quickly. A strong boom and arm help you dig deeper and lift heavier loads. The bucket must stay sharp and free of damage for the best digging function.
Bucket Teeth
Bucket teeth take the most wear during digging. They cut into the ground and break up hard soil. Worn teeth make the bucket less effective. You should check the bucket teeth often. Replace them if they look dull or broken. Fresh teeth help your bucket dig faster and use less fuel. Many operators replace bucket teeth more often than other parts. This keeps the excavator working at its best.
Tip: Bucket teeth, air filters, belts, seals, hoses, hydraulic filters, fuel filters, and oil filters are among the most frequently replaced parts on Sumitomo excavators.
Quick Coupler
A quick coupler lets you change buckets and other tools fast. You save time because you do not need special tools. Quick couplers come in different types, such as mechanical, hydraulic, and tilt. Each type fits different jobs. You can switch from a digging bucket to a grading bucket in minutes. Quick couplers make your excavator more versatile and safe. You spend less time changing tools and more time working.
Quick hitches improve efficiency and safety.
You attach tools quickly and securely, which reduces downtime.
Mechanical, hydraulic, and tilt hitches fit different needs and boost versatility.
Auxiliary Attachments
Auxiliary attachments give your excavator more options. You can add a breaker, grapple, or auger to the end of the arm. These tools help you break concrete, grab debris, or drill holes. The right attachment turns your excavator into a multi-purpose machine. You can handle many tasks without switching equipment. Always check that the boom, arm, and bucket can handle the extra weight and force from these tools.
Note: Regular inspection of all attachments and wear parts helps you spot problems early. This keeps your excavator safe and productive.
Frequently Replaced Excavator Parts and Maintenance Tips
Filters (Oil, Fuel, Air)
You need to change filters often. This keeps your excavator working well. Oil, fuel, and air filters protect the engine from dirt. They also keep the hydraulic system safe. Clean filters help every part work right. If you skip changing filters, you might clog the engine. This can cause trouble. Sumitomo filters use strong materials. They meet ISO standards. These filters catch tiny dust and keep your machine safe.
Function | Description |
|---|---|
Fuel Filter | Removes bad stuff and water from fuel. This protects important parts and lowers wear. |
Follow the schedule from the manufacturer for changing filters. Good filters help stop clogs and keep your excavator strong.
Seals and Gaskets
Seals and gaskets stop leaks in your excavator. You find them in the engine and hydraulic system. They are also in other important parts. Seals and gaskets wear out over time. You should check them often. Plan to change them when needed. If you see oil or fluid leaking, change these parts fast. Changing seals and gaskets early helps you avoid bigger repairs. It keeps your excavator working well.
Signs of Wear
You can find signs of wear if you look for leaks. Cracks and strange noises are also signs. Worn filters, seals, and gaskets cause many problems. If you see dirty oil or weak power, check your parts. Slow movement can mean you need new parts. Look for hoses that are swollen. Loose belts and worn bucket teeth are also signs. Changing parts early saves money and time.
Hydraulic system problems cause lots of downtime. Change hydraulic filters and seal kits on time. Check hoses for swelling or damage. Change them before they break.
Maintenance Best Practices
You can use these tips to keep your excavator in good shape:
Maintenance Task | Frequency |
|---|---|
Look at your machine, check fluids, track tension, and grease important spots | Daily |
Change engine oil and oil filter | Every 50–250 hours |
Change hydraulic filter and check hydraulic fluid | Every 250–500 hours |
Check and change fuel and air filters | Every 500–1,000 hours |
Do big checks like valve lash, turbo, and undercarriage | Every 1,000+ hours |
Always use good parts from trusted suppliers like YNF Machinery.
Change filters, seals, and gaskets as part of your regular care.
Write down all your maintenance and replacement work.
Check your excavator every day for leaks and loose bolts.
Grease important spots and check fluids as part of your routine.
Tip: Changing parts often and following these tips helps you stop breakdowns. It also makes your excavator last longer.
Knowing the main Sumitomo excavator parts and what they do helps you use your machine safely. Doing regular checks and changing old parts stops breakdowns. This makes your excavator last longer. If you need help, look at the Sumitomo parts catalog or talk to an expert. YNF Machinery can also give you good support. When you understand your machine, you save time and money on each job.
FAQ
What are the most common parts you need to replace on a Sumitomo excavator?
You often need to replace filters, seals, bucket teeth, and hoses. These parts wear out quickly. Checking them often helps you avoid bigger problems.
How do you know when to change hydraulic oil or filters?
Watch for slow movement, strange noises, or warning lights. If you see dirty oil or clogged filters, change them right away. Follow the schedule in your manual.
Can you use aftermarket parts for your Sumitomo excavator?
Yes, you can use aftermarket parts. Make sure you choose high-quality parts from trusted suppliers. YNF Machinery offers reliable options for Sumitomo excavators.
Why do bucket teeth wear out so fast?
Bucket teeth dig into hard soil and rocks. They face a lot of force and friction. This makes them wear down quickly. Replace them when they look dull or broken.
Where can you find the right part numbers for your Sumitomo excavator?
Check your Sumitomo parts catalog or your machine’s manual. You can also ask YNF Machinery for help finding the correct part numbers.
